Expobar Office Control Espresso Machine E61 Brew Group. Programmable Extraction Amount - You set how much water goes through each shot. Heat Exchange Boiler System - NO WAIT for steam. Stainless steel housing - Beautiful machine to spotlight on your counter. The all copper boiler has a capacity of 1.8 liters. It has an internal heat exchanger that prevents the water used for brewing from coming in contact with the water stored in the boiler for steaming or hot water dispensing. With its commercial style design you can brew and steam or dispense hot water whenever you want to. This is especially important when entertaining or when used in a commercial application.